<?php
    /** PHPExcel root directory */
    if (!defined('PHPEXCEL_ROOT')) {
        define('PHPEXCEL_ROOT', dirname(__FILE__) . '/');
        require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
    }

    /**
     * PHPExcel
     * Copyright (c) 2006 - 2015 PHPExcel
     * This library is free software; you can redistribute it and/or
     * modify it under the terms of the GNU Lesser General Public
     * License as published by the Free Software Foundation; either
     * version 2.1 of the License, or (at your option) any later version.
     * This library is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * Lesser General Public License for more details.
     * You should have received a copy of the GNU Lesser General Public
     * License along with this library; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
     * @category   PHPExcel
     * @package    PHPExcel
     * @copyright  Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
     * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
     * @version    ##VERSION##, ##DATE##
     */
    class PHPExcel {
        /**
         * Unique ID
         * @var string
         */
        private $uniqueID;
        /**
         * Document properties
         * @var PHPExcel_DocumentProperties
         */
        private $properties;
        /**
         * Document security
         * @var PHPExcel_DocumentSecurity
         */
        private $security;
        /**
         * Collection of Worksheet objects
         * @var PHPExcel_Worksheet[]
         */
        private $workSheetCollection = [];
        /**
         * Calculation Engine
         * @var PHPExcel_Calculation
         */
        private $calculationEngine;
        /**
         * Active sheet index
         * @var integer
         */
        private $activeSheetIndex = 0;
        /**
         * Named ranges
         * @var PHPExcel_NamedRange[]
         */
        private $namedRanges = [];
        /**
         * CellXf supervisor
         * @var PHPExcel_Style
         */
        private $cellXfSupervisor;
        /**
         * CellXf collection
         * @var PHPExcel_Style[]
         */
        private $cellXfCollection = [];
        /**
         * CellStyleXf collection
         * @var PHPExcel_Style[]
         */
        private $cellStyleXfCollection = [];
        /**
         * hasMacros : this workbook have macros ?
         * @var bool
         */
        private $hasMacros = false;
        /**
         * macrosCode : all macros code (the vbaProject.bin file, this include form, code,  etc.), null if no macro
         * @var binary
         */
        private $macrosCode;
        /**
         * macrosCertificate : if macros are signed, contains vbaProjectSignature.bin file, null if not signed
         * @var binary
         */
        private $macrosCertificate;
        /**
         * ribbonXMLData : null if workbook is'nt Excel 2007 or not contain a customized UI
         * @var null|string
         */
        private $ribbonXMLData;
        /**
         * ribbonBinObjects : null if workbook is'nt Excel 2007 or not contain embedded objects (picture(s)) for Ribbon Elements
         * ignored if $ribbonXMLData is null
         * @var null|array
         */
        private $ribbonBinObjects;

        /**
         * Create a new PHPExcel with one Worksheet
         */
        public function __construct() {
            $this->uniqueID          = uniqid();
            $this->calculationEngine = new PHPExcel_Calculation($this);
            // Initialise worksheet collection and add one worksheet
            $this->workSheetCollection   = [];
            $this->workSheetCollection[] = new PHPExcel_Worksheet($this);
            $this->activeSheetIndex      = 0;
            // Create document properties
            $this->properties = new PHPExcel_DocumentProperties();
            // Create document security
            $this->security = new PHPExcel_DocumentSecurity();
            // Set named ranges
            $this->namedRanges = [];
            // Create the cellXf supervisor
            $this->cellXfSupervisor = new PHPExcel_Style(true);
            $this->cellXfSupervisor->bindParent($this);
            // Create the default style
            $this->addCellXf(new PHPExcel_Style);
            $this->addCellStyleXf(new PHPExcel_Style);
        }

        /**
         * Add a cellXf to the workbook
         * @param PHPExcel_Style $style
         */
        public function addCellXf(PHPExcel_Style $style) {
            $this->cellXfCollection[] = $style;
            $style->setIndex(count($this->cellXfCollection) - 1);
        }

        /**
         * Add a cellStyleXf to the workbook
         * @param PHPExcel_Style $pStyle
         */
        public function addCellStyleXf(PHPExcel_Style $pStyle) {
            $this->cellStyleXfCollection[] = $pStyle;
            $pStyle->setIndex(count($this->cellStyleXfCollection) - 1);
        }

        /**
         * The workbook has macros ?
         * @return boolean true if workbook has macros, false if not
         */
        public function hasMacros() {
            return $this->hasMacros;
        }

        /**
         * Return the macros code
         * @return string|null
         */
        public function getMacrosCode() {
            return $this->macrosCode;
        }

        /**
         * Set the macros code
         * @param string $MacrosCode string|null
         */
        public function setMacrosCode($MacrosCode = null) {
            $this->macrosCode = $MacrosCode;
            $this->setHasMacros(!is_null($MacrosCode));
        }

        /**
         * Define if a workbook has macros
         * @param boolean $hasMacros true|false
         */
        public function setHasMacros($hasMacros = false) {
            $this->hasMacros = (bool)$hasMacros;
        }

        /**
         * Is the project signed ?
         * @return boolean true|false
         */
        public function hasMacrosCertificate() {
            return !is_null($this->macrosCertificate);
        }

        /**
         * Return the macros certificate
         * @return string|null
         */
        public function getMacrosCertificate() {
            return $this->macrosCertificate;
        }

        /**
         * Set the macros certificate
         * @param string|null $Certificate
         */
        public function setMacrosCertificate($Certificate = null) {
            $this->macrosCertificate = $Certificate;
        }

        /**
         * Remove all macros, certificate from spreadsheet
         */
        public function discardMacros() {
            $this->hasMacros         = false;
            $this->macrosCode        = null;
            $this->macrosCertificate = null;
        }

        /**
         * retrieve ribbon XML Data
         * return string|null|array
         */
        public function getRibbonXMLData($What = 'all') //we need some constants here...
        {
            $ReturnData = null;
            $What       = strtolower($What);
            switch ($What) {
                case 'all':
                    $ReturnData = $this->ribbonXMLData;
                    break;
                case 'target':
                case 'data':
                    if (is_array($this->ribbonXMLData) && array_key_exists($What, $this->ribbonXMLData)) {
                        $ReturnData = $this->ribbonXMLData[$What];
                    }
                    break;
            }
            return $ReturnData;
        }

        /**
         * set ribbon XML data
         */
        public function setRibbonXMLData($Target = null, $XMLData = null) {
            if (!is_null($Target) && !is_null($XMLData)) {
                $this->ribbonXMLData = [
                    'target' => $Target,
                    'data'   => $XMLData
                ];
            } else {
                $this->ribbonXMLData = null;
            }
        }

        /**
         * retrieve Binaries Ribbon Objects
         */
        public function getRibbonBinObjects($What = 'all') {
            $ReturnData = null;
            $What       = strtolower($What);
            switch ($What) {
                case 'all':
                    return $this->ribbonBinObjects;
                    break;
                case 'names':
                case 'data':
                    if (is_array($this->ribbonBinObjects) && array_key_exists($What, $this->ribbonBinObjects)) {
                        $ReturnData = $this->ribbonBinObjects[$What];
                    }
                    break;
                case 'types':
                    if (is_array($this->ribbonBinObjects) && array_key_exists('data', $this->ribbonBinObjects) && is_array($this->ribbonBinObjects['data'])) {
                        $tmpTypes   = array_keys($this->ribbonBinObjects['data']);
                        $ReturnData = array_unique(array_map([
                                                                 $this,
                                                                 'getExtensionOnly'
                                                             ], $tmpTypes
                                                   )
                        );
                    } else {
                        $ReturnData = []; // the caller want an array... not null if empty
                    }
                    break;
            }
            return $ReturnData;
        }

        /**
         * store binaries ribbon objects (pictures)
         */
        public function setRibbonBinObjects($BinObjectsNames = null, $BinObjectsData = null) {
            if (!is_null($BinObjectsNames) && !is_null($BinObjectsData)) {
                $this->ribbonBinObjects = [
                    'names' => $BinObjectsNames,
                    'data'  => $BinObjectsData
                ];
            } else {
                $this->ribbonBinObjects = null;
            }
        }

        /**
         * This workbook have a custom UI ?
         * @return boolean true|false
         */
        public function hasRibbon() {
            return !is_null($this->ribbonXMLData);
        }

        /**
         * This workbook have additionnal object for the ribbon ?
         * @return boolean true|false
         */
        public function hasRibbonBinObjects() {
            return !is_null($this->ribbonBinObjects);
        }

        /**
         * Check if a sheet with a specified code name already exists
         * @param string $pSheetCodeName Name of the worksheet to check
         * @return boolean
         */
        public function sheetCodeNameExists($pSheetCodeName) {
            return ($this->getSheetByCodeName($pSheetCodeName) !== null);
        }

        /**
         * Get sheet by code name. Warning : sheet don't have always a code name !
         * @param string $pName Sheet name
         * @return PHPExcel_Worksheet
         */
        public function getSheetByCodeName($pName = '') {
            $worksheetCount = count($this->workSheetCollection);
            for ($i = 0; $i < $worksheetCount; ++$i) {
                if ($this->workSheetCollection[$i]->getCodeName() == $pName) {
                    return $this->workSheetCollection[$i];
                }
            }
            return null;
        }

        /**
         * Code to execute when this worksheet is unset()
         */
        public function __destruct() {
            $this->calculationEngine = null;
            $this->disconnectWorksheets();
        }

        /**
         * Disconnect all worksheets from this PHPExcel workbook object,
         *    typically so that the PHPExcel object can be unset
         */
        public function disconnectWorksheets() {
            $worksheet = null;
            foreach ($this->workSheetCollection as $k => &$worksheet) {
                $worksheet->disconnectCells();
                $this->workSheetCollection[$k] = null;
            }
            unset($worksheet);
            $this->workSheetCollection = [];
        }    //    function getCellCacheController()

        /**
         * Return the calculation engine for this worksheet
         * @return PHPExcel_Calculation
         */
        public function getCalculationEngine() {
            return $this->calculationEngine;
        }

        /**
         * Get properties
         * @return PHPExcel_DocumentProperties
         */
        public function getProperties() {
            return $this->properties;
        }

        /**
         * Set properties
         * @param PHPExcel_DocumentProperties $pValue
         */
        public function setProperties(PHPExcel_DocumentProperties $pValue) {
            $this->properties = $pValue;
        }

        /**
         * Get security
         * @return PHPExcel_DocumentSecurity
         */
        public function getSecurity() {
            return $this->security;
        }

        /**
         * Set security
         * @param PHPExcel_DocumentSecurity $pValue
         */
        public function setSecurity(PHPExcel_DocumentSecurity $pValue) {
            $this->security = $pValue;
        }

        /**
         * Get active sheet
         * @return PHPExcel_Worksheet
         * @throws PHPExcel_Exception
         */
        public function getActiveSheet() {
            return $this->getSheet($this->activeSheetIndex);
        }

        /**
         * Create sheet and add it to this workbook
         * @param  int|null $iSheetIndex Index where sheet should go (0,1,..., or null for last)
         * @return PHPExcel_Worksheet
         * @throws PHPExcel_Exception
         */
        public function createSheet($iSheetIndex = null) {
            $newSheet = new PHPExcel_Worksheet($this);
            $this->addSheet($newSheet, $iSheetIndex);
            return $newSheet;
        }

        /**
         * Add sheet
         * @param  PHPExcel_Worksheet $pSheet
         * @param  int|null           $iSheetIndex Index where sheet should go (0,1,..., or null for last)
         * @return PHPExcel_Worksheet
         * @throws PHPExcel_Exception
         */
        public function addSheet(PHPExcel_Worksheet $pSheet, $iSheetIndex = null) {
            if ($this->sheetNameExists($pSheet->getTitle())) {
                throw new PHPExcel_Exception("Workbook already contains a worksheet named '{$pSheet->getTitle()}'. Rename this worksheet first."
                );
            }
            if ($iSheetIndex === null) {
                if ($this->activeSheetIndex < 0) {
                    $this->activeSheetIndex = 0;
                }
                $this->workSheetCollection[] = $pSheet;
            } else {
                // Insert the sheet at the requested index
                array_splice($this->workSheetCollection, $iSheetIndex, 0, [$pSheet]
                );
                // Adjust active sheet index if necessary
                if ($this->activeSheetIndex >= $iSheetIndex) {
                    ++$this->activeSheetIndex;
                }
            }
            if ($pSheet->getParent() === null) {
                $pSheet->rebindParent($this);
            }
            return $pSheet;
        }

        /**
         * Check if a sheet with a specified name already exists
         * @param  string $pSheetName Name of the worksheet to check
         * @return boolean
         */
        public function sheetNameExists($pSheetName) {
            return ($this->getSheetByName($pSheetName) !== null);
        }

        /**
         * Get sheet by name
         * @param  string $pName Sheet name
         * @return PHPExcel_Worksheet
         */
        public function getSheetByName($pName = '') {
            $worksheetCount = count($this->workSheetCollection);
            for ($i = 0; $i < $worksheetCount; ++$i) {
                if ($this->workSheetCollection[$i]->getTitle() === $pName) {
                    return $this->workSheetCollection[$i];
                }
            }
            return null;
        }

        /**
         * Remove sheet by index
         * @param  int $pIndex Active sheet index
         * @throws PHPExcel_Exception
         */
        public function removeSheetByIndex($pIndex = 0) {
            $numSheets = count($this->workSheetCollection);
            if ($pIndex > $numSheets - 1) {
                throw new PHPExcel_Exception("You tried to remove a sheet by the out of bounds index: {$pIndex}. The actual number of sheets is {$numSheets}."
                );
            } else {
                array_splice($this->workSheetCollection, $pIndex, 1);
            }
            // Adjust active sheet index if necessary
            if (($this->activeSheetIndex >= $pIndex) && ($pIndex > count($this->workSheetCollection) - 1)) {
                --$this->activeSheetIndex;
            }
        }

        /**
         * Get all sheets
         * @return PHPExcel_Worksheet[]
         */
        public function getAllSheets() {
            return $this->workSheetCollection;
        }

        /**
         * Set index for sheet by sheet name.
         * @param  string $sheetName Sheet name to modify index for
         * @param  int    $newIndex  New index for the sheet
         * @return int New sheet index
         * @throws PHPExcel_Exception
         */
        public function setIndexByName($sheetName, $newIndex) {
            $oldIndex = $this->getIndex($this->getSheetByName($sheetName));
            $pSheet   = array_splice($this->workSheetCollection, $oldIndex, 1
            );
            array_splice($this->workSheetCollection, $newIndex, 0, $pSheet
            );
            return $newIndex;
        }

        /**
         * Get index for sheet
         * @param  PHPExcel_Worksheet $pSheet
         * @return int Sheet index
         * @throws PHPExcel_Exception
         */
        public function getIndex(PHPExcel_Worksheet $pSheet) {
            foreach ($this->workSheetCollection as $key => $value) {
                if ($value->getHashCode() == $pSheet->getHashCode()) {
                    return $key;
                }
            }
            throw new PHPExcel_Exception("Sheet does not exist.");
        }

        /**
         * Get active sheet index
         * @return int Active sheet index
         */
        public function getActiveSheetIndex() {
            return $this->activeSheetIndex;
        }

        /**
         * Set active sheet index
         * @param  int $pIndex Active sheet index
         * @throws PHPExcel_Exception
         * @return PHPExcel_Worksheet
         */
        public function setActiveSheetIndex($pIndex = 0) {
            $numSheets = count($this->workSheetCollection);
            if ($pIndex > $numSheets - 1) {
                throw new PHPExcel_Exception("You tried to set a sheet active by the out of bounds index: {$pIndex}. The actual number of sheets is {$numSheets}."
                );
            } else {
                $this->activeSheetIndex = $pIndex;
            }
            return $this->getActiveSheet();
        }

        /**
         * Set active sheet index by name
         * @param  string $pValue Sheet title
         * @return PHPExcel_Worksheet
         * @throws PHPExcel_Exception
         */
        public function setActiveSheetIndexByName($pValue = '') {
            if (($worksheet = $this->getSheetByName($pValue)) instanceof PHPExcel_Worksheet) {
                $this->setActiveSheetIndex($this->getIndex($worksheet));
                return $worksheet;
            }
            throw new PHPExcel_Exception('Workbook does not contain sheet:' . $pValue);
        }

        /**
         * Get sheet names
         * @return string[]
         */
        public function getSheetNames() {
            $returnValue    = [];
            $worksheetCount = $this->getSheetCount();
            for ($i = 0; $i < $worksheetCount; ++$i) {
                $returnValue[] = $this->getSheet($i)->getTitle();
            }
            return $returnValue;
        }

        /**
         * Get sheet count
         * @return int
         */
        public function getSheetCount() {
            return count($this->workSheetCollection);
        }

        /**
         * Get sheet by index
         * @param  int $pIndex Sheet index
         * @return PHPExcel_Worksheet
         * @throws PHPExcel_Exception
         */
        public function getSheet($pIndex = 0) {
            if (!isset($this->workSheetCollection[$pIndex])) {
                $numSheets = $this->getSheetCount();
                throw new PHPExcel_Exception("Your requested sheet index: {$pIndex} is out of bounds. The actual number of sheets is {$numSheets}."
                );
            }
            return $this->workSheetCollection[$pIndex];
        }

        /**
         * Add external sheet
         * @param  PHPExcel_Worksheet $pSheet      External sheet to add
         * @param  int|null           $iSheetIndex Index where sheet should go (0,1,..., or null for last)
         * @throws PHPExcel_Exception
         * @return PHPExcel_Worksheet
         */
        public function addExternalSheet(PHPExcel_Worksheet $pSheet, $iSheetIndex = null) {
            if ($this->sheetNameExists($pSheet->getTitle())) {
                throw new PHPExcel_Exception("Workbook already contains a worksheet named '{$pSheet->getTitle()}'. Rename the external sheet first.");
            }
            // count how many cellXfs there are in this workbook currently, we will need this below
            $countCellXfs = count($this->cellXfCollection);
            // copy all the shared cellXfs from the external workbook and append them to the current
            foreach ($pSheet->getParent()->getCellXfCollection() as $cellXf) {
                $this->addCellXf(clone $cellXf);
            }
            // move sheet to this workbook
            $pSheet->rebindParent($this);
            // update the cellXfs
            foreach ($pSheet->getCellCollection(false) as $cellID) {
                $cell = $pSheet->getCell($cellID);
                $cell->setXfIndex($cell->getXfIndex() + $countCellXfs);
            }
            return $this->addSheet($pSheet, $iSheetIndex);
        }

        /**
         * Get the workbook collection of cellXfs
         * @return PHPExcel_Style[]
         */
        public function getCellXfCollection() {
            return $this->cellXfCollection;
        }

        /**
         * Get named ranges
         * @return PHPExcel_NamedRange[]
         */
        public function getNamedRanges() {
            return $this->namedRanges;
        }

        /**
         * Add named range
         * @param  PHPExcel_NamedRange $namedRange
         * @return boolean
         */
        public function addNamedRange(PHPExcel_NamedRange $namedRange) {
            if ($namedRange->getScope() == null) {
                // global scope
                $this->namedRanges[$namedRange->getName()] = $namedRange;
            } else {
                // local scope
                $this->namedRanges[$namedRange->getScope()->getTitle() . '!' . $namedRange->getName()] = $namedRange;
            }
            return true;
        }

        /**
         * Get named range
         * @param  string                  $namedRange
         * @param  PHPExcel_Worksheet|null $pSheet Scope. Use null for global scope
         * @return PHPExcel_NamedRange|null
         */
        public function getNamedRange($namedRange, PHPExcel_Worksheet $pSheet = null) {
            $returnValue = null;
            if ($namedRange != '' && ($namedRange !== null)) {
                // first look for global defined name
                if (isset($this->namedRanges[$namedRange])) {
                    $returnValue = $this->namedRanges[$namedRange];
                }
                // then look for local defined name (has priority over global defined name if both names exist)
                if (($pSheet !== null) && isset($this->namedRanges[$pSheet->getTitle() . '!' . $namedRange])) {
                    $returnValue = $this->namedRanges[$pSheet->getTitle() . '!' . $namedRange];
                }
            }
            return $returnValue;
        }

        /**
         * Remove named range
         * @param  string                  $namedRange
         * @param  PHPExcel_Worksheet|null $pSheet Scope: use null for global scope.
         * @return PHPExcel
         */
        public function removeNamedRange($namedRange, PHPExcel_Worksheet $pSheet = null) {
            if ($pSheet === null) {
                if (isset($this->namedRanges[$namedRange])) {
                    unset($this->namedRanges[$namedRange]);
                }
            } else {
                if (isset($this->namedRanges[$pSheet->getTitle() . '!' . $namedRange])) {
                    unset($this->namedRanges[$pSheet->getTitle() . '!' . $namedRange]);
                }
            }
            return $this;
        }

        /**
         * Copy workbook (!= clone!)
         * @return PHPExcel
         */
        public function copy() {
            $copied = clone $this;
            $worksheetCount = count($this->workSheetCollection);
            for ($i = 0; $i < $worksheetCount; ++$i) {
                $this->workSheetCollection[$i] = $this->workSheetCollection[$i]->copy();
                $this->workSheetCollection[$i]->rebindParent($this);
            }
            return $copied;
        }

        /**
         * Implement PHP __clone to create a deep clone, not just a shallow copy.
         */
        public function __clone() {
            foreach ($this as $key => $val) {
                if (is_object($val) || (is_array($val))) {
                    $this->{$key} = unserialize(serialize($val));
                }
            }
        }

        /**
         * Get cellXf by index
         * @param  int $pIndex
         * @return PHPExcel_Style
         */
        public function getCellXfByIndex($pIndex = 0) {
            return $this->cellXfCollection[$pIndex];
        }

        /**
         * Get cellXf by hash code
         * @param  string $pValue
         * @return PHPExcel_Style|boolean False if no match found
         */
        public function getCellXfByHashCode($pValue = '') {
            foreach ($this->cellXfCollection as $cellXf) {
                if ($cellXf->getHashCode() == $pValue) {
                    return $cellXf;
                }
            }
            return false;
        }

        /**
         * Check if style exists in style collection
         * @param  PHPExcel_Style $pCellStyle
         * @return boolean
         */
        public function cellXfExists($pCellStyle = null) {
            return in_array($pCellStyle, $this->cellXfCollection, true);
        }

        /**
         * Get default style
         * @return PHPExcel_Style
         * @throws PHPExcel_Exception
         */
        public function getDefaultStyle() {
            if (isset($this->cellXfCollection[0])) {
                return $this->cellXfCollection[0];
            }
            throw new PHPExcel_Exception('No default style found for this workbook');
        }

        /**
         * Remove cellXf by index. It is ensured that all cells get their xf index updated.
         * @param integer $pIndex Index to cellXf
         * @throws PHPExcel_Exception
         */
        public function removeCellXfByIndex($pIndex = 0) {
            if ($pIndex > count($this->cellXfCollection) - 1) {
                throw new PHPExcel_Exception("CellXf index is out of bounds.");
            } else {
                // first remove the cellXf
                array_splice($this->cellXfCollection, $pIndex, 1);
                // then update cellXf indexes for cells
                foreach ($this->workSheetCollection as $worksheet) {
                    foreach ($worksheet->getCellCollection(false) as $cellID) {
                        $cell    = $worksheet->getCell($cellID);
                        $xfIndex = $cell->getXfIndex();
                        if ($xfIndex > $pIndex) {
                            // decrease xf index by 1
                            $cell->setXfIndex($xfIndex - 1);
                        } elseif ($xfIndex == $pIndex) {
                            // set to default xf index 0
                            $cell->setXfIndex(0);
                        }
                    }
                }
            }
        }

        /**
         * Get the cellXf supervisor
         * @return PHPExcel_Style
         */
        public function getCellXfSupervisor() {
            return $this->cellXfSupervisor;
        }

        /**
         * Get the workbook collection of cellStyleXfs
         * @return PHPExcel_Style[]
         */
        public function getCellStyleXfCollection() {
            return $this->cellStyleXfCollection;
        }

        /**
         * Get cellStyleXf by index
         * @param integer $pIndex Index to cellXf
         * @return PHPExcel_Style
         */
        public function getCellStyleXfByIndex($pIndex = 0) {
            return $this->cellStyleXfCollection[$pIndex];
        }

        /**
         * Get cellStyleXf by hash code
         * @param  string $pValue
         * @return PHPExcel_Style|boolean False if no match found
         */
        public function getCellStyleXfByHashCode($pValue = '') {
            foreach ($this->cellStyleXfCollection as $cellStyleXf) {
                if ($cellStyleXf->getHashCode() == $pValue) {
                    return $cellStyleXf;
                }
            }
            return false;
        }

        /**
         * Remove cellStyleXf by index
         * @param integer $pIndex Index to cellXf
         * @throws PHPExcel_Exception
         */
        public function removeCellStyleXfByIndex($pIndex = 0) {
            if ($pIndex > count($this->cellStyleXfCollection) - 1) {
                throw new PHPExcel_Exception("CellStyleXf index is out of bounds.");
            } else {
                array_splice($this->cellStyleXfCollection, $pIndex, 1);
            }
        }

        /**
         * Eliminate all unneeded cellXf and afterwards update the xfIndex for all cells
         * and columns in the workbook
         */
        public function garbageCollect() {
            // how many references are there to each cellXf ?
            $countReferencesCellXf = [];
            foreach ($this->cellXfCollection as $index => $cellXf) {
                $countReferencesCellXf[$index] = 0;
            }
            foreach ($this->getWorksheetIterator() as $sheet) {
                // from cells
                foreach ($sheet->getCellCollection(false) as $cellID) {
                    $cell = $sheet->getCell($cellID);
                    ++$countReferencesCellXf[$cell->getXfIndex()];
                }
                // from row dimensions
                foreach ($sheet->getRowDimensions() as $rowDimension) {
                    if ($rowDimension->getXfIndex() !== null) {
                        ++$countReferencesCellXf[$rowDimension->getXfIndex()];
                    }
                }
                // from column dimensions
                foreach ($sheet->getColumnDimensions() as $columnDimension) {
                    ++$countReferencesCellXf[$columnDimension->getXfIndex()];
                }
            }
            // remove cellXfs without references and create mapping so we can update xfIndex
            // for all cells and columns
            $countNeededCellXfs = 0;
            $map                = [];
            foreach ($this->cellXfCollection as $index => $cellXf) {
                if ($countReferencesCellXf[$index] > 0 || $index == 0) { // we must never remove the first cellXf
                    ++$countNeededCellXfs;
                } else {
                    unset($this->cellXfCollection[$index]);
                }
                $map[$index] = $countNeededCellXfs - 1;
            }
            $this->cellXfCollection = array_values($this->cellXfCollection);
            // update the index for all cellXfs
            foreach ($this->cellXfCollection as $i => $cellXf) {
                $cellXf->setIndex($i);
            }
            // make sure there is always at least one cellXf (there should be)
            if (empty($this->cellXfCollection)) {
                $this->cellXfCollection[] = new PHPExcel_Style();
            }
            // update the xfIndex for all cells, row dimensions, column dimensions
            foreach ($this->getWorksheetIterator() as $sheet) {
                // for all cells
                foreach ($sheet->getCellCollection(false) as $cellID) {
                    $cell = $sheet->getCell($cellID);
                    $cell->setXfIndex($map[$cell->getXfIndex()]);
                }
                // for all row dimensions
                foreach ($sheet->getRowDimensions() as $rowDimension) {
                    if ($rowDimension->getXfIndex() !== null) {
                        $rowDimension->setXfIndex($map[$rowDimension->getXfIndex()]);
                    }
                }
                // for all column dimensions
                foreach ($sheet->getColumnDimensions() as $columnDimension) {
                    $columnDimension->setXfIndex($map[$columnDimension->getXfIndex()]);
                }
                // also do garbage collection for all the sheets
                $sheet->garbageCollect();
            }
        }

        /**
         * Get worksheet iterator
         * @return PHPExcel_WorksheetIterator
         */
        public function getWorksheetIterator() {
            return new PHPExcel_WorksheetIterator($this);
        }

        /**
         * Return the unique ID value assigned to this spreadsheet workbook
         * @return string
         */
        public function getID() {
            return $this->uniqueID;
        }

        /**
         * return the extension of a filename. Internal use for a array_map callback (php<5.3 don't like lambda function)
         */
        private function getExtensionOnly($ThePath) {
            return pathinfo($ThePath, PATHINFO_EXTENSION);
        }
    }
